Combined electrical connecter and fuse plug



' March 6, 1934. P. H. KELLEY ET AL 1,950,131

COMBINED ELECTRICAL CONNECTER AND FUSE PLUG Filed April 11, 1933 ATTORNEY.

Patented Mar. 6, 1934 STATE COMBINED ELECTRICAL CGNNECTER Am FUSE PLUG Philip H. Kelley and Richard E. Kelley,

Greenfield,

Application April 11, 1933, Serial No. 635,521

1%) Glaims.

This invention relates to improvements in a combined electrical connection and fuse plug of the type that is employed to connect any special piece of electrical apparatus with a source of electrical energy, as for example, a washing machine and the driving motors for other machines. At the present time, when the electric motor, if a washing machine and its wringer, is electrically connected to the wiring of the house circuit, the fuses in the house circuits often blow out, with the result that all of the house circuits are out of use. The blowing of the fuses frequently results, when an extra load is suddenly placed on the wringer; thus requiring an abnormal current to be thrown or to the house circuit fuse, or fuses.

An object of our invention is to obviate and remove this objection by providing a connecter, or fuse plug, that can be readily inserted into any ordinary outlet box, for making a direct electrical connection with the piece of apparatus to be operated, and, combined with this connector, or plug, is a fuse plug, which will blow whenever an abnormal load is placed on the single piece of apparatus, as a washing machine and its wringer, for example. This arrangement, therefore, prevents any of the other circuits of the house from being broken.

Broadly considered, our invention comprises two separable and matched shell members of insulating material, having projecting leads, or terminals at one end for insertion into an outlet box, spring-retaining contacts at its opposite end, to receive the attaching plug on the end of the electric cable of the machine to be operated and a threaded metallic fuse socket to receive a fuse plug that is included in the circuit of one of the projecting leads, or terminals, and spring contact, whereby, when the fuse blows, it is only necessary to remove the blown fuse anu insert another in its place, with practically no interruption of the operation of the machine and no breaking of the house circuit.

Referring to the drawing:---

Fig. 1 indicates an elevational view of the combined connector and fuse plug, showing at the left, the connecting cable of a machine to be operated, and, at the right,,an outlet box and the fuse removed.

Fig. 2 is a top plan view with the fuse plug removed.

Fig. 3 is a vertical sectional view on the line 3-3 of Fig. 4, showing the threaded fuse socket member for receiving the fuse plug, the upper and lower shell pieces of insulation, the threaded member, and one of the projecting lead terminals and contacts.

Fig. 4 is a bottom plan view of the upper shell member, showing the two extension terminals and the two spring contact-retaining terminals.

is placed the threaded metallic fuse socket sleeve 4, having the flat, bottom extension portion 5, that is located under the contact, or lead plate 6, shown in Fig. 6. 7 indicates the twisted end portion of the lead plate 6, to which the spring contact-retaining piece 8 is secured, with the rivet 9. The lead plate 6 is electrically connected tothe bottom, extension portion 5 of the fuse-socket (see Fig. 3), and is formed with the large open ing 10, which. registers with a similar opening 11, in the extension portion 5 of the fuse socket. Located above and below the lead plate 6 and extension 5 of the fuse socket, are the washers of insulation, l2 and 13. la designates one of the extension lead terminals having the inwardly, extending angular portion 15, which is fixedly secured to the bottom extension 5 of the threaded fuse shell casing i, the lead plate 6, and the up per and lower discs of insulation 12 and 13, by means of the screws post 16, which has a threaded connection with the extension lead terminal l4. l7 designates the other through contact, lead extension, terminal, having the curved, or bowed part 18, which is located in the curved groove 19 of the upper shell member 1. This terminal is formed with the end portion 20, located in the recess 21, and to which the spring contact 22 is secured with the rivet 23. The two spring contacts, 8 and 22, are located opposite the openings, 24 and 25, which match, of -register, with the openings 26 and 27 of the lower, b1; shell base member 2, when assembled. 28, 29, and 30 designate the remaining three recesses in the top shell member 1 and 31, 32, 33 and 34 designate corresponding and matching recesses in the base, or lower, shell member 2. The member 2 is formed with the curved groove 35 to receive the curved portion 18 of the through extension lead contact 1'7, and 36 and 37'designate openings in the base member 2, which register with corresponding openings in the upper shell member 1,

through which the contact lead members 14 and 17 project, when assembled. The base 2 is formed with the angular disposed recess 38, to receive the angular portion 15 of the extension lead terminal contact member 14 and the central recess 39, to receive the lower end-of the screw post 16. 38' is a recess to receive the insulation disc 13. 40 indicates a fuse plug for threading into the threaded fuse sleeve 4. 41 indicates the means for securingthe upper and lower shell members together.

The wall outlet is indicated at 42and the cable 43 and attaching plug 44 with the terminals 45, which engage the spring-retaining contacts 8 and 22. The electric current is as followsz-through the lead member 1'7, cable 43, back through lead plate 6, threaded fuse sleeve 4, fuse plug 40 to the lead extension contact 14. Should the fuse 40 blow out it is only necessary to replace it with a new one and not disturb the house, or other circuits, in any way.

What we claim is:-

1. A combined connecter and fuse plug comprising upper and lower recessed members, means for securing them together, the upper member only having an upwardly upper extending portion with a recess therein, a fuse shell in the recess which is formed with a bottom extension and an opening in one side thereof, a lead plate electrically connected to the said bottom extension and extending through the opening of the fuse shell, a spring contact secured to the said lead plate, a lead terminal extending beyond the shell member and electrically connected to the lead plate when the fuse is inserted in the shell, means for insulating the leads from each other, a second extension terminal, and a spring contact secured to the same.

2. A connecter and fuse plug therein, comprising two members, means for securing the same together, said members each having co-operating recesses in their corner portions, lead terminals in the recesses projecting from the memond spring contact on the other projecting lead terminal and located within the members, said fuse shell being electrically connected to the flat lead plate and one of the projecting lead terminals when the fuse plug is inserted.

3. A combined connecter and fuse plug comprising upper and lower shell members, one of the members having a metallic fuse socket thereon, two terminals projecting from the casing, two terminals located within the shell members, one of which is electrically connected to the metallic fuse socket and the other forming an integral part of one of the said external projecting terminals, and the other external projecting terminal being electrically connected by means of a lead plate to the centrally located terminal of the fuse socket, disk means for insulating the fuse socket from the said one external terminal, and means for securing the fuse socket, the insulating means, one external terminal and one of the said terminals located within the shell members together, said means also electrically connecting the said one external terminal to a fuse plug in the fuse shell which means secures together the said lead plate, the second lead terminal, the insulating means and the fuse shell, a third lead member and spring contact thereon.

4. A combined connecter plug and fuse comprising in combinaton, two recessed members, two contact terminals within the recesses of these members, two externally located plug blades, a slotted metallic fuse socket in one of the said members, blade means in the slotted fuse socket for electrically connecting one of the said contact terminals to the metallic fuse shell, means for electrically connecting one of the said plug blades tc'the centrally located contact terminal with which a fuse plug engages when inserted in the metallic fuse socket, comprising a screw post threaded into the said plug terminal, means for insulating the said plug blade from the metallic fuse socket and from said contact terminal, and means for securing the recessed members together.

5. A connecter plug comprising two recessed members having matched openings in its opposite ends, plug blades in some of the openings, spring contacts opposite the other openings, a metallic fuse socket with a slotted bottom portion, a lead plate carrying one of the spring contacts and partially located in and extending through the slotted bottom portion and electrically connected to the fuse socket, one of the plug blades being insulated from the fuse socket-and from the lead plate, and means in the said plug blade for securing the same, the lead plate, fuse socket and insulating means together.

6. A combined connecter and fuse plug, comprising two matched recessed members, a plug lead extending completely through and projecting beyond the connecter, a fuse socket in one of said members, a lead plate electrically connected to the fuse socket, a second plug lead also extending beyond the connecter, means for insulating the lead plate from the second plug lead, the lead plate being electrically connected to the fuse socket by means of a screw post in the socket connected to the second plug lead.

'7. A combined connecter and fuse plug, comprising two members, a plug lead extending through and projecting beyond the members, a lead plate, a second plug lead extending beyond the members, means for insulating the lead plate from the second plug lead, a fuse socket in one of said members, the lead plate being electrically connected to the fuse socket, and means in the socket for connecting the second plug lead.

8. A combined connecter and fuse plug comprising a member, plug blades in the member and projecting from the member, a metallic fuse socket in the member, a lead plate electrically connected to the fuse socket, one of the plug blades being insulated from the fuse socket and from the lead plate, means in the plug blade for securing the same to the lead plate, fuse socket, and insulating means together.

9. A combined connecter and fuse plug comprising a member, plug blades in the member and projecting from the member, a metallic fuse socketin the member, a lead plate electrically connected to the fuse socket, one of the plug blades being insulated from the fuse socket and from the lead plate, means in the plug blade for securing the same to the lead plate, fuse socket, and insulating means together,a plate member secured to said member, and spring means for making an electric connection with the plug blades.

10. In a combined connecter and fuse plug, two members, each having matching recesses therein, two externally extending plug contacts located in and extending from the said recesses at one end of the members, spring contacts 10- cated in the other recesses, a metallic i'use socket in one member, which is formed-with a bottom portion and an opening in its side, a lead plate electrically connected to the metallic iusesocket located in said opening and carrying one of the spring contacts, one of the members having a central recess and a transverse recess formed in the central recess, one oi the externally extending contacts being bent at its inner end and located in the transverse recess, a disc of insulation in the central recess and engaging the bent end of said contact for insulating the bent end 

